Voters Gunnar Dykstra-Erickson (left) talks with his mom (middle) as his sister Rianneke Erickson (right wearing lavender) puts her ballots in at the Mission United Presbyterian church on Tuesday, Nov. 6, 2018, in San Francisco. less

Voters Gunnar Dykstra-Erickson (left) talks with his mom (middle) as his sister Rianneke Erickson (right wearing lavender) puts her ballots in at the Mission United Presbyterian church on Tuesday, Nov. 6, 2018, ... more

Gavin Newsom (right) holds his son Dutch as he listens to direction from Anne Shaheen (left), deputy inspector, as he prepares to cast his vote at the Masonic Lodge on Tuesday, Nov. 6, 2018 in Larkspur.

Gavin Newsom (right) holds his son Dutch as he listens to direction from Anne Shaheen (left), deputy inspector, as he prepares to cast his vote at the Masonic Lodge on Tuesday, Nov. 6, 2018 in Larkspur.

Photo: Lea Suzuki, The Chronicle

Gavin Newsom (right) holds his son Dutch as he listens to direction...photo-16458500.187017 - |ucfirst

Lt. Governor Gavin Newsom walks with his children as he carries his ballot to a polling booth to voteat the Masonic Lodge on Tuesday, Nov. 6, 2018 in Larkspur.

Lt. Governor Gavin Newsom walks with his children as he carries his ballot to a polling booth to voteat the Masonic Lodge on Tuesday, Nov. 6, 2018 in Larkspur.

Photo: Lea Suzuki, The Chronicle

Lt. Governor Gavin Newsom walks with his children as he carries his...photo-16458754.187017 - |ucfirst

Christine Sarkis reviews the ballot with her son Augie Boardman, 6, while for an open voting booth at a polling place at Fire Station No. 4 in Berkeley on Tuesday, Nov. 6, 2018.

Christine Sarkis reviews the ballot with her son Augie Boardman, 6, while for an open voting booth at a polling place at Fire Station No. 4 in Berkeley on Tuesday, Nov. 6, 2018.

Photo: Paul Chinn / The Chronicle

Christine Sarkis reviews the ballot with her son Augie Boardman, 6,...photo-16457425.187017 - |ucfirst

San Francisco residents voted at City Hall Tuesday for the midterm elections.

San Francisco residents voted at City Hall Tuesday for the midterm elections.

Photo: Sarah Ravani

San Francisco residents voted at City Hall Tuesday for the midterm...photo-16456986.187017 - |ucfirst

Allison Solomon (middle) waits for her ballot with her son Alex Solomon (right), 9 years old, at 8 Sala St. as it opens for voting on Tuesday, Nov. 6, 2018 in San Francisco. She also dropped her husband's mail in ballot as he is out of town. less

Allison Solomon (middle) waits for her ballot with her son Alex Solomon (right), 9 years old, at 8 Sala St. as it opens for voting on Tuesday, Nov. 6, 2018 in San Francisco. She also dropped her husband's mail ... more

Photo: Liz Hafalia / The Chronicle

Allison Solomon (middle) waits for her ballot with her son Alex...photo-16457461.187017 - |ucfirst

Voter Dennis Haaf (left) was the first to receive his ballot at 8 Sala St. opens for voting on Tuesday, Nov. 6, 2018 in San Francisco. He has been the first voter at this polling place for the past twelve years. less

Voter Dennis Haaf (left) was the first to receive his ballot at 8 Sala St. opens for voting on Tuesday, Nov. 6, 2018 in San Francisco. He has been the first voter at this polling place for the past twelve ... more

Photo: Liz Hafalia / The Chronicle

Voter Dennis Haaf (left) was the first to receive his ballot at 8...photo-16457463.187017 - |ucfirst

A woman marks her ballot at a polling place at the Lawrence Hall of Science in Berkeley on Tuesday, Nov. 6, 2018.

A woman marks her ballot at a polling place at the Lawrence Hall of Science in Berkeley on Tuesday, Nov. 6, 2018.

Photo: Paul Chinn / The Chronicle

A woman marks her ballot at a polling place at the Lawrence Hall of...photo-16457421.187017 - |ucfirst

Vivi Boardman, 5, watches her father Joel Boardman mark his ballot at a polling place at Fire Station No. 4 in Berkeley on Tuesday, Nov. 6, 2018.

Vivi Boardman, 5, watches her father Joel Boardman mark his ballot at a polling place at Fire Station No. 4 in Berkeley on Tuesday, Nov. 6, 2018.